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Technically correct but practically useless

Scheduled Pinned Locked Moved The Lounge
csharpc++iotquestion
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  • honey the codewitchH honey the codewitch

    So I'm wrapping this

    The quick brown fox jumped over the lazy dog

    And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

    The quick
    brown
    fox jumped
    over the
    lazy dog

    Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

    To err is human. Fortune favors the monsters.

    B Offline
    B Offline
    BorkenkaeferFrisstFichten
    wrote on last edited by
    #9

    The correct phrase is: the quick brown fox jumps over the lazy dogs back 0123456789 That was the final test the engineer made after the telex device had been installed at the customer's premises. The funny "phrase" contains all characters a Telex had to be able to receive and transmit correctly via POTS using its very own error-correction. At the time this was relevant, it was very much useful as it had been an industry standard procedure. It was also used for testing serial terminals' keyboards.

    honey the codewitchH 1 Reply Last reply
    0
    • Richard DeemingR Richard Deeming

      Does the OS you're using not have ICU[^] support built-in?

      "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

      honey the codewitchH Offline
      honey the codewitchH Offline
      honey the codewitch
      wrote on last edited by
      #10

      What OS? FreeRTOS? No. And it wouldn't know what to do with truetype anyway. It has no concept of graphics

      To err is human. Fortune favors the monsters.

      1 Reply Last reply
      0
      • B BorkenkaeferFrisstFichten

        The correct phrase is: the quick brown fox jumps over the lazy dogs back 0123456789 That was the final test the engineer made after the telex device had been installed at the customer's premises. The funny "phrase" contains all characters a Telex had to be able to receive and transmit correctly via POTS using its very own error-correction. At the time this was relevant, it was very much useful as it had been an industry standard procedure. It was also used for testing serial terminals' keyboards.

        honey the codewitchH Offline
        honey the codewitchH Offline
        honey the codewitch
        wrote on last edited by
        #11

        Mine was accurate, just truncated at the s :laugh:

        To err is human. Fortune favors the monsters.

        1 Reply Last reply
        0
        • Sander RosselS Sander Rossel

          I have a simple(r) solution. Print the character to an image (in-memory, obviously). Now connect to some OCR service and let it scan the image. If the result is null, "", " " or " " it's whitespace. Just thinking outside the box :D

          Best, Sander Azure DevOps Succinctly (free eBook) Azure Serverless Succinctly (free eBook) Migrating Apps to the Cloud with Azure arrgh.js - Bringing LINQ to JavaScript

          honey the codewitchH Offline
          honey the codewitchH Offline
          honey the codewitch
          wrote on last edited by
          #12

          *angeryface* :mad:

          To err is human. Fortune favors the monsters.

          1 Reply Last reply
          0
          • L Lost User

            Hmmm, Can you go into technical details about the difficulties? I can't figure out why you need 'a massive table'.

            honey the codewitchH Offline
            honey the codewitchH Offline
            honey the codewitch
            wrote on last edited by
            #13

            The table isn't as big as a thought. A long time ago I wrote something to spit out character class tables, and I thought I remembered the whitespace one being huge. It's not, now that I looked it up. Still, it's larger than I'd like.

            To err is human. Fortune favors the monsters.

            L 1 Reply Last reply
            0
            • honey the codewitchH honey the codewitch

              The table isn't as big as a thought. A long time ago I wrote something to spit out character class tables, and I thought I remembered the whitespace one being huge. It's not, now that I looked it up. Still, it's larger than I'd like.

              To err is human. Fortune favors the monsters.

              L Offline
              L Offline
              Lost User
              wrote on last edited by
              #14

              honey the codewitch wrote:

              Still, it's larger than I'd like.

              I don't think you need to check for all of them. I think you can get away with just 12. isWhitespace[^] Btw, now that .NET is using ICU[^] this should match the C# behavior. (I just checked ICU docs to confirm)

              honey the codewitchH 1 Reply Last reply
              0
              • honey the codewitchH honey the codewitch

                So I'm wrapping this

                The quick brown fox jumped over the lazy dog

                And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

                The quick
                brown
                fox jumped
                over the
                lazy dog

                Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

                To err is human. Fortune favors the monsters.

                T Offline
                T Offline
                TheRealSteveJudge
                wrote on last edited by
                #15

                No idea, but shouldn't it be "The quick brown fox jumps over the lazy dog"? :laugh:

                M 1 Reply Last reply
                0
                • L Lost User

                  honey the codewitch wrote:

                  Still, it's larger than I'd like.

                  I don't think you need to check for all of them. I think you can get away with just 12. isWhitespace[^] Btw, now that .NET is using ICU[^] this should match the C# behavior. (I just checked ICU docs to confirm)

                  honey the codewitchH Offline
                  honey the codewitchH Offline
                  honey the codewitch
                  wrote on last edited by
                  #16

                  Yeah, but I'm not using .NET, and my platform doesn't understand unicode beyond wchar_t which I can't even use.

                  To err is human. Fortune favors the monsters.

                  L 1 Reply Last reply
                  0
                  • honey the codewitchH honey the codewitch

                    Yeah, but I'm not using .NET, and my platform doesn't understand unicode beyond wchar_t which I can't even use.

                    To err is human. Fortune favors the monsters.

                    L Offline
                    L Offline
                    Lost User
                    wrote on last edited by
                    #17

                    honey the codewitch wrote:

                    Yeah, but I'm not using .NET, and my platform doesn't understand unicode

                    Nobody in this thread thinks you are using .NET I'm saying that you can write a C function for your IoT device that will duplicate Java and C# whitespace behavior simply by checking for those 12 values. They are all doing the same thing as ICU.

                    honey the codewitchH 1 Reply Last reply
                    0
                    • L Lost User

                      honey the codewitch wrote:

                      Yeah, but I'm not using .NET, and my platform doesn't understand unicode

                      Nobody in this thread thinks you are using .NET I'm saying that you can write a C function for your IoT device that will duplicate Java and C# whitespace behavior simply by checking for those 12 values. They are all doing the same thing as ICU.

                      honey the codewitchH Offline
                      honey the codewitchH Offline
                      honey the codewitch
                      wrote on last edited by
                      #18

                      Ohhhh thanks. Sorry, it was early and I was still a bit slow. I'll do that.

                      To err is human. Fortune favors the monsters.

                      1 Reply Last reply
                      0
                      • honey the codewitchH honey the codewitch

                        So I'm wrapping this

                        The quick brown fox jumped over the lazy dog

                        And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

                        The quick
                        brown
                        fox jumped
                        over the
                        lazy dog

                        Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

                        To err is human. Fortune favors the monsters.

                        P Offline
                        P Offline
                        PIEBALDconsult
                        wrote on last edited by
                        #19

                        For part of my UTF-8 decoder I use a sparse array, but of course I'm using C# so I can catch Index Exceptions. I guess I now have to add more characters to it though.

                        1 Reply Last reply
                        0
                        • T TheRealSteveJudge

                          No idea, but shouldn't it be "The quick brown fox jumps over the lazy dog"? :laugh:

                          M Offline
                          M Offline
                          megaadam
                          wrote on last edited by
                          #20

                          TheRealSteveJudge wrote:

                          jumps

                          I think you must've solved it!

                          "If we don't change direction, we'll end up where we're going"

                          T 1 Reply Last reply
                          0
                          • M megaadam

                            TheRealSteveJudge wrote:

                            jumps

                            I think you must've solved it!

                            "If we don't change direction, we'll end up where we're going"

                            T Offline
                            T Offline
                            TheRealSteveJudge
                            wrote on last edited by
                            #21

                            :laugh:

                            1 Reply Last reply
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